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Paper Abstract and Keywords
Presentation 2010-02-18 10:50
Design and the Characteristics of Electrically Very Small Antennas for Wireless Connection with Reactive Electromagnetic Field Coupling
Tomohiro Maruchi, Toshiki Ito, Seiya Masuda, Naoki Inagaki, Katsuyuki Fujii (Nanzan Univ.) AP2009-188
Abstract (in Japanese) (See Japanese page) 
(in English) This report discusses electrically very small antennas for wireless connection via reactive electromagnetic fields. The excellent characteristics of the antennas with optimally designed port impedances and load reactance have been verified by experiment. Loop antennas and inverted L antennas have been used for Resonance Method Lead by Magnetic Field and Resonance Method Lead by Electric Field, respectively. The experiment have been conducted at the frequency of $135.6$MHz, which is 10 times higher than the IMS band frequency of $13.56$MHz, with $1/10$ scale models. The conducting ground plane has been used in the experiments, which ensures the high precision and the conveniences of the measurements with a network analyzer. One half turn loops located on conducting plane at the communication distance of $0.1$m have shown power transmission efficiency of about $70\%$. The inverted L antennas at the distance of $0.015$m have shown that of $80\%$ or higher over a wide range of frequency. In addition, it has been observed in the experiments that the transmission characteristics of the inverted L antennas are not affected even if they are covered by a shield box, and that they are almost independent of the orientation of the horizontal parts of the antennas. These results implies the usefulness of the Resonance Method Lead by Electric Field.
Keyword (in Japanese) (See Japanese page) 
(in English) electromagnetic field coupling / resonance method lead by magnetic field / resonance method lead by magnetic field / power transmission efficiency / conjugate-image admittance / / /  
Reference Info. IEICE Tech. Rep., vol. 109, no. 417, AP2009-188, pp. 23-28, Feb. 2010.
Paper # AP2009-188 
Date of Issue 2010-02-11 (AP) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
Copyright
and
reproduction		 All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
Download PDF AP2009-188

Conference Information
Committee AP  
Conference Date 2010-02-18 - 2010-02-19 
Place (in Japanese) (See Japanese page) 
Place (in English) Toshiba 
Topics (in Japanese) (See Japanese page) 
Topics (in English) AP 
Paper Information
Registration To AP 
Conference Code 2010-02-AP 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Design and the Characteristics of Electrically Very Small Antennas for Wireless Connection with Reactive Electromagnetic Field Coupling 
Sub Title (in English)  
Keyword(1) electromagnetic field coupling  
Keyword(2) resonance method lead by magnetic field  
Keyword(3) resonance method lead by magnetic field  
Keyword(4) power transmission efficiency  
Keyword(5) conjugate-image admittance  
Keyword(6)  
Keyword(7)  
Keyword(8)  
1st Author's Name Tomohiro Maruchi  
1st Author's Affiliation Nanzan University (Nanzan Univ.)
2nd Author's Name Toshiki Ito  
2nd Author's Affiliation Nanzan University (Nanzan Univ.)
3rd Author's Name Seiya Masuda  
3rd Author's Affiliation Nanzan University (Nanzan Univ.)
4th Author's Name Naoki Inagaki  
4th Author's Affiliation Nanzan University (Nanzan Univ.)
5th Author's Name Katsuyuki Fujii  
5th Author's Affiliation Nanzan University (Nanzan Univ.)
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Speaker Author-1 
Date Time 2010-02-18 10:50:00 
Presentation Time 25 minutes 
Registration for AP 
Paper # AP2009-188 
Volume (vol) vol.109 
Number (no) no.417 
Page pp.23-28 
#Pages 6 
Date of Issue 2010-02-11 (AP) 

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